How to Register for MTD: Complete Sign-Up Walkthrough

Registering for Making Tax Digital does not happen automatically. Even if you are already VAT-registered or a Self Assessment taxpayer, you need to actively sign up for MTD through HMRC or via your accounting software. This walkthrough covers exactly how to register, what you need before you start, common errors, and what happens once you are signed up.

There are actually three separate MTD schemes you may need to register for, each with its own sign-up process:

•       MTD VAT (mandatory since April 2022 for VAT-registered businesses)
•       MTD ITSA (starting April 2026 for self-employed and landlords over £50,000)
•       MTD Corporation Tax (planned April 2027 for all Ltd companies)

This guide is written by ICAEW chartered accountants who register clients for MTD every day. We will cover each scheme step-by-step, what you need to prepare in advance, what to do when things go wrong during registration, and how to know when your registration is complete.

Which MTD Scheme Do You Need to Register For?

Start here. Match your situation to the right scheme (or schemes):

Multiple registrations possible: A VAT-registered sole trader with £70k self-employment income needs to register for BOTH MTD VAT (now) and MTD ITSA (by April 2026). A Ltd company director with rental income over £50k needs to register the Ltd company for MTD Corporation Tax AND their personal MTD ITSA.

What You Need Before You Start Registration

Get these ready before you begin the registration process. Missing information causes the majority of failed registrations we see:

For MTD VAT Registration

•       Your VAT registration number
•       Your Government Gateway user ID and password
•       Your business’s VAT scheme (Standard, Cash, Flat Rate, or Annual)
•       Your VAT quarter end dates
•       An MTD-compatible software account (see our Best MTD Software guide)
•       A UK business bank account (for Direct Debit setup, recommended)

For MTD ITSA Registration

•       Your Unique Taxpayer Reference (UTR) – 10 digits
•       Your National Insurance number
•       Your Government Gateway user ID and password
•       Details of your qualifying income sources (self-employment, property, or both)
•       An MTD-compatible software account
•       Your business or property start date

For MTD Corporation Tax (When Available)

•       Company Registration Number (CRN) from Companies House
•       Company Tax Reference number
•       Your Government Gateway user ID and password (business account, not personal)
•       Company accounting period dates
•       An MTD-compatible software account with Corporation Tax capability

Government Gateway confusion: The single most common registration failure is using the wrong Government Gateway account. Personal Gateway is different from Business Gateway. VAT and Corporation Tax use Business Gateway. Personal ITSA uses Personal Gateway. If you get ‘no records found’ errors, you are almost certainly using the wrong Gateway account.

How to Register for MTD VAT (Step-by-Step)

There are two ways to register for MTD VAT. Method 1 (via your accounting software) is easier for most people. Method 2 (direct on HMRC) is available if you prefer to register before choosing software.

Method 1: Register Via Your Accounting Software (Recommended)

1.     Sign up for MTD-compatible accounting software (FreeAgent, Xero, QuickBooks, Sage, or bridging software)
2.     Enter your business VAT number and details during software setup
3.     Navigate to VAT settings and look for ‘Connect to HMRC’ or ‘MTD VAT setup’
4.     Click the connect button and follow the prompts to Government Gateway
5.     Sign in with your Government Gateway credentials
6.     Authorise your software to submit VAT returns on your behalf
7.     Wait 72 hours for HMRC to process the registration
8.     Submit your first return via the software once HMRC confirms activation

Method 2: Register Direct on gov.uk

9.     Go to gov.uk and search for ‘Sign up for Making Tax Digital for VAT’
10. Click ‘Sign up for Making Tax Digital for VAT’
11. Sign in with your Government Gateway credentials (Business account)
12. Enter your VAT number and business details
13. Choose whether you or an agent will submit returns
14. Confirm your details and submit the registration
15. You will receive an email confirmation within 72 hours
16. Then connect your MTD-compatible software to HMRC

Timing warning: Do not submit a non-MTD VAT return within 15 working days BEFORE your MTD registration date, or the registration may reject. If you have a VAT return due soon, either submit it BEFORE registering for MTD, or register for MTD FIRST and submit via the new system.

How to Register for MTD ITSA (Step-by-Step)

MTD ITSA registration opens formally ahead of the April 2026 mandate. HMRC ran a voluntary pilot programme from 2023 through 2025, but full public registration begins in 2025-2026 for the first mandated wave.

Step-by-Step MTD ITSA Registration

17. Ensure you have your UTR (Unique Taxpayer Reference) – if not, register for Self Assessment first
18. Sign up for MTD-compatible ITSA software
19. Log into gov.uk and search for ‘Sign up as an individual for Making Tax Digital for Income Tax’
20. Sign in with your Government Gateway credentials (Personal account)
21. Confirm you meet MTD ITSA criteria (income over relevant threshold)
22. Provide details of your income sources
23. Choose whether you will submit or your accountant will submit as your agent
24. Authorise your software or accountant to submit on your behalf
25. Receive email confirmation of registration
26. Begin quarterly submissions from the start of your first MTD tax year

Read our MTD for Sole Traders guide for detailed MTD ITSA setup information.

How to Register for MTD Corporation Tax (Coming April 2027)

MTD Corporation Tax registration is not yet open. HMRC will begin accepting registrations closer to the April 2027 mandate date (currently planned). When it opens, expect the process to follow this general pattern:

27. Sign up for MTD-compatible Corporation Tax software (Xero, Sage, QuickBooks, or specialist providers)
28. Log into gov.uk with your Company Business Tax Account credentials
29. Register for MTD Corporation Tax scheme
30. Confirm company details including CRN and accounting period
31. Authorise your software or accountant as agent
32. Begin quarterly Corporation Tax updates from the start of your first MTD accounting period

See our MTD Limited Companies and Corporation Tax guide for full details on preparing your Ltd company for the April 2027 launch.

Common MTD Registration Errors (And How to Fix Them)

Error 1: ‘No records found matching your details’

Usually caused by using the wrong Government Gateway account (Personal instead of Business, or vice versa). VAT and Corporation Tax use Business Gateway. Personal ITSA uses Personal Gateway. Check which Gateway account you are logged into and try again.

Error 2: ‘Your VAT return is not due for filing yet’

This appears if you try to submit a VAT return through MTD before HMRC has fully processed your MTD sign-up. Wait 72 hours after registration and try again. If still failing after 72 hours, contact HMRC.

Error 3: ‘You cannot register for MTD at this time’

This can appear if you have submitted a non-MTD VAT return in the last 15 working days. HMRC needs a clear gap between old-system submissions and MTD activation. Wait 15 working days from your last non-MTD return before registering.

Error 4: ‘Cannot connect software to HMRC’

Usually a browser cookie or session issue. Try a different browser, clear cache and cookies, ensure pop-ups are not blocked (the Government Gateway login opens in a new window), and try again. If persistent, contact your software provider’s support.

Error 5: ‘Agent authorisation failed’

If your accountant is registering on your behalf, they need a separate Agent Services Account with HMRC, then you need to complete the 64-8 agent authorisation form. This is a two-step process that fails if either step is skipped.

What Happens After You Register

Within 24-72 Hours

•       HMRC processes your registration
•       You receive an email confirmation from HMRC
•       Your accounting software can start submitting on your behalf
•       Your old VAT return submission portal is no longer available for this account

Ongoing After Registration

•       Submit VAT returns quarterly via MTD software (1 month + 7 days after quarter end)
•       Keep all business records digitally in your MTD software
•       Set up Direct Debit for VAT payments (highly recommended)
•       Watch for HMRC correspondence via your Business Tax Account

Case Study: Fixing a Failed MTD VAT Registration

A small independent retailer in the Leeds area came to us in early 2026 in a stressful position. She had been attempting to register her recently VAT-registered business for MTD VAT for over 6 weeks, receiving repeated ‘no records found’ errors on HMRC’s registration portal. Her quarterly VAT return was already 3 weeks overdue, and she was concerned about mounting penalties.

Her situation:

•       Newly VAT-registered Ltd company (crossed £90k threshold in late 2025)
•       Attempted MTD VAT registration 4 times with repeated errors
•       VAT return 3 weeks overdue
•       Software (QuickBooks) unable to connect to HMRC MTD service
•       HMRC helpline calls resulting in 45+ minute waits

What we did:

33. Diagnosed the issue: she was signing in with her Personal Government Gateway account rather than the Business account tied to her Ltd company’s VAT registration
34. Helped her locate the correct Business Gateway credentials for her Ltd company
35. Registered her for MTD VAT successfully at the second attempt using correct credentials
36. Connected QuickBooks to the MTD service
37. Submitted the overdue VAT return within 48 hours of successful registration
38. Contacted HMRC to explain the registration delay had caused the late submission and negotiated waiver of late-filing penalty
39. Set up Direct Debit for future VAT payments
40. Provided quick-reference documentation for her future logins

Outcome: MTD VAT registration completed within 3 days of our involvement. Overdue return submitted. Late-filing penalty (£200) waived by HMRC given the demonstrable registration difficulties. Future VAT returns now flow smoothly. Total time from her call to us to full resolution: 5 working days.

MTD Registration: FAQs

How do I sign up for Making Tax Digital?

It depends on which MTD scheme you need. MTD VAT: register via your accounting software or direct on gov.uk (Business Gateway). MTD ITSA: register via gov.uk (Personal Gateway) starting late 2025 for April 2026 mandate. MTD Corporation Tax: registration opens closer to the April 2027 mandate.

Do I register for MTD automatically if I am already VAT-registered?

No. You must actively sign up for MTD VAT even if you have been VAT-registered for years. HMRC does not migrate existing VAT registrations automatically. If you have been submitting VAT returns via the old HMRC portal after April 2022, you may have been in breach of MTD requirements.

Where do I sign up for MTD VAT on the government website?

Search ‘Sign up for Making Tax Digital for VAT’ on gov.uk, or start from within your MTD-compatible accounting software (usually easier). You will need your VAT number and Business Government Gateway credentials.

Do I need to register my company separately or through the personal account?

Different schemes use different accounts. MTD VAT and MTD Corporation Tax use your Business Government Gateway account tied to your company. MTD ITSA uses your Personal Government Gateway account (your personal Self Assessment record). Getting these mixed up causes the majority of registration failures.

How long does MTD registration take?

The actual registration process takes about 15-30 minutes if you have all information ready. HMRC processing typically takes 24-72 hours before your software can begin submitting returns. Plan MTD registration at least 2 weeks before your first return is due to avoid deadline stress.

Can my accountant register for MTD on my behalf?

Yes, using an Agent Services Account (ASA). Your accountant creates the ASA with HMRC, then you complete a 64-8 authorisation confirming they can act as your agent. Once both steps are complete, they can register you for MTD and manage your submissions.

What if I miss the MTD registration deadline?

Register immediately. Missed deadlines can trigger penalties: £400 per return for non-MTD submissions after mandate, plus points-based penalties (£200 after 4 points), plus interest and late-payment penalties. Chartered accountant support can help negotiate with HMRC on missed registrations.

Can I register for MTD if I only became VAT-registered recently?

Yes. Register for MTD VAT as soon as your VAT registration is confirmed by HMRC. Some businesses register for VAT and MTD VAT simultaneously; some VAT-register first then MTD-register once VAT is confirmed. Either approach works.

What software do I need before I register for MTD?

MTD-compatible accounting software (FreeAgent, Xero, QuickBooks, Sage, or bridging software for Excel users). Set up your software account first, enter your business details, then register for MTD from within the software. This is smoother than registering via gov.uk first.

Do I need to sign up for MTD ITSA if I have Self Assessment already?

Yes, if your qualifying income is over the relevant threshold (£50,000 from April 2026, £30,000 from 2027, £20,000 from 2028). Self Assessment continues as your annual reporting mechanism (renamed Final Declaration under MTD), but you need to actively register for MTD ITSA to add the quarterly submission requirement.

What if I run multiple businesses?

Each MTD scheme applies at the taxpayer level. A sole trader with multiple businesses (e.g., freelance consulting and Airbnb hosting) registers once for MTD ITSA. A director of two Ltd companies registers each company separately for MTD Corporation Tax. Multiple VAT-registered businesses each need their own MTD VAT registration.

Can I opt out of MTD?

Very limited exemptions apply: digital exclusion (age, disability, remote location without internet), religious beliefs preventing digital record-keeping, or bankruptcy proceedings. Applications for exemption are reviewed case-by-case by HMRC. General preference for paper records is NOT a valid exemption reason.

What if I make errors during MTD registration?

Common errors include using the wrong Government Gateway account, submitting a non-MTD return within 15 days before MTD registration, or missing agent authorisation. Fixes are documented in our Common MTD Registration Errors section above. Persistent problems warrant chartered accountant support.

Do I need a UK business bank account to register for MTD?

Not strictly required for registration, but strongly recommended. Direct Debit for VAT payments requires a UK business bank account and eliminates late payment risk. Some MTD software also requires a UK bank connection for bank feed features.

What happens if HMRC rejects my MTD registration?

You will receive a rejection email explaining the reason. Common rejection reasons: mismatched details between your registration and existing HMRC records, invalid VAT number or UTR, or duplicate registration attempt. Correct the underlying issue and re-register. Chartered accountant help can identify subtle mismatches.

Get Help Registering for MTD – Free ICAEW Consultation

MTD registration seems simple in theory but goes wrong more often than most people expect. Wrong Government Gateway accounts, agent authorisation failures, timing conflicts with existing VAT returns, and software connection issues all create real headaches. Getting registration right first time saves days of stress and potentially triggers waiver of late-registration penalties.

At MTD – Making Tax Digital (part of B1 Accountants), our ICAEW chartered accountants handle MTD registration every day. We can:

•       Handle your entire MTD VAT, MTD ITSA, or MTD Corporation Tax registration
•       Set up correct Government Gateway credentials and Agent Services Account
•       Choose and configure the right MTD-compatible software for your business
•       Resolve any HMRC registration errors or delays
•       Negotiate with HMRC on late-registration penalties where circumstances warrant
•       Handle ongoing MTD submissions at fixed monthly fees from £40
•       Provide clear step-by-step documentation you can refer back to